dwieeb

With this plugin, you will be able to include certain CSS or JS files in only selected posts, pages, or other post types, instead of including them everywhere. You can also edit inline CSS & JS and include CSS & JS files from anywhere on specific posts and pages.
It places meta boxes in the WordPress post editor so it’s easy to select which files you want to include with the post you’re currently editing. This plugin works well for all websites, large and small, and it works well with WordPress multi-site (WordPress MU). Tested up to 3.1 beta 2.
See this plugin’s <a href="http://www.danielimhoff.com/wordpress-plugins/specific-files/" rel="nofollow ugc">page</a> on my website for information/comments/questions. I am open to the idea of suggestions and patches to this plugin! If you enjoyed this plugin, please <a href="http://www.danielimhoff.com/donations/" rel="nofollow ugc">donate</a> or <a href="http://www.danielimhoff.com/donations/" rel="nofollow ugc">say thanks</a>.
Todo:
<ul>
<li>Add a “remove references” button on the options page so people can remove file references without having to delete the file.</li>
</ul>

Specific Files

This plugin allows you to include CSS or JS files in specific posts and pages.

dimitris33

This plugin adds suport for the TwentyFifteen theme to the <a href="https://wordpress.org/extend/plugins/styles" rel="ugc">Styles plugin</a>.
About Styles TwentyFifteen
Using this plugin with the Styles plugin you can instantly change the style of the TwentyFifteen theme from the customizer.
Features of the plugin
<ul>
<li>Instant previews</li>
<li>Text size</li>
<li>Google Fonts</li>
<li>Text colors</li>
<li>Border colors</li>
<li>Background colors</li>
<li>Hundreds of options</li>
<li>Consistent interface and names in every theme</li>
<li>Built on WordPress customizer, so Styles grows as WordPress grows</li>
</ul>
Styles and options for all built-in WordPress themes are free. More themes are available at <a href="http://stylesplugin.com" rel="nofollow ugc">StylesPlugin.com</a>.
Free Themes
<ul>
<li>TwentyTen: <a href="http://demo.stylesplugin.com/twentyten" rel="nofollow ugc">Demo</a></li>
<li>TwentyEleven: <a href="http://demo.stylesplugin.com/twentyeleven" rel="nofollow ugc">Demo</a></li>
<li>TwentyTwelve: <a href="http://demo.stylesplugin.com/twentytwelve" rel="nofollow ugc">Demo</a></li>
<li>TwentyThirteen: <a href="http://demo.stylesplugin.com/twentythirteen" rel="nofollow ugc">Demo</a></li>
</ul>
Developer Resources
<ul>
<li><a href="https://github.com/stylesplugin" rel="nofollow ugc">Styles on Github</a></li>
<li><a href="https://github.com/brainstormmedia" rel="nofollow ugc">Brainstorm Media on Github</a></li>
<li>Code Walkthrough: <a href="http://www.youtube.com/playlist?list=PLxj61Fojm1RGevBh10U2qCqjwoH4Awo-P" rel="nofollow ugc">How to add support for your own themes</a></li>
</ul>

Styles: TwentyFifteen

This plugin adds suport for the TwentyFifteen1 theme to the Styles plugin.

Specific Files vs Styles: TwentyFifteen